O.E.
storm, from P.Gmc.
*sturmaz (cf. O.N.
stormr, O.S., M.L.G., M.Du., Du.
storm, O.H.G., Ger.
sturm). O.Fr.
estour "onset, tumult," It.
stormo are Gmc. loan-words. Fig. (non-meteorological) sense was in late O.E. The verb in the sense of "to rage, be violent" is from c.1380; military sense (1645) first used by Oliver Cromwell.
Storm-door first recorded 1878;
storm-water is from 1879;
storm-window is attested from 1824.
Storm-troops (Ger.
sturmtruppen) is from 1917, introduced by the German military in World War I.
Storm-trooper "member of the Nazi
Sturmabteilung" is from 1933 (see
Sturmabteilung).
[shtohrm] 
n] 
